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Finding the Fourth Proportional to 57,761.58, 86,642.88 and 20,321.94

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Solution

The fourth proportional to 57,761.58, 86,642.88 and 20,321.94 is: 30,483.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,761.58 : 86,642.88 = 20,321.94 : x
  2. Step 2: Convert to fraction form
    57,761.58/86,642.88 = 20,321.94/x
  3. Step 3: Cross multiply
    57,761.58x = 86,642.88 × 20,321.94
  4. Step 4: Simplify right side
    57,761.58x = 1,760,751,408.79
  5. Step 5: Solve for x
    x = 1,760,751,408.79/57,761.58
  6. Step 6: Final answer
    x = 30,483.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.